Listing calculator



06f. 6, 1942. p. CROSMAN 2,298,201

LISTING CALCULATOR Filed Oct. 18, 1938 6 Sheets-Sheet l 3mm/dov Lok/NGCEOs/m4n,

Oct. 6, 1942. x.. P. cRosMAN 2,298,201

LISTING CALCULATOR Filed Oct. 18, 1938 6 Sheets-Sheet 2 me/who@ LOE/NGf. CeosMA/v,

Oct. 6, 1942 L. P. cRosMAN LISTING CALCULATOR Filed Oct. 18, 19158 6Sheets-Sheet 3 me/Wto@ LOE/NG P C/eosM/Q/v,

Oct. 6, 1942. L P. cRosMAN LISTING CALCULATOR Filed Oct. 18, 1938 6Sheets-Sheet 4 Imam/bolo LOE/NG P C/aosMA/v,

flmmm Oct. 6, 1942. 1 P. CROSMAN LISTING CALCULATOR Filed oct. 1a, 1938s sheets-sheets gmc/who@ Log/NG P CEOs/MN,

0d' 6, 1942- L. P. cRosMAN 2,298,201

LISTING CALCULATOR Filed Oct. 18, 1938 6 Sheets-Sheet 6 LOE/NG /.D020s/wmv) Y @3M @.CUMMAM Ffm l www Patented Oct. 6, 1942 UNITED-STATESPATENT OFFICE LISTING CALCULATOR Loring Pickering Crosman, Maplewood, N.J., assignor to Monroe Calculating Machine Company, Orange, N. J., acorporation of Delaware Application October 18, 1938, Serial No. 235,673

3 Claims.

The invention has relation to listing calculators wherein means areprovided for accomplishing the registration of true negative totals, anobject of the invention being to provide certain improvements upon themachine of the Patent Number 1,915,296, issued to Loring P. Crosman,June 27, 1933, whereby the machine may be brought to a stop prior to theprinting of said totals and the operator having been made aware that thetotal represents an overdraft, may either print the true negative totalon the statement sheet or on a separate sheet of paper or may arrangefor clearing the total from the accumulator without printing; oralternatively the operator may print a total which is supposed to benegative without interruption of the total taking operation.

The invention consists in the novel construction and combinations ofparts as hereinafter set forth in the claims.

In the accompanying drawings,

Figure l is a transverse section of the machine showing the registeringand printing mechanisms.

Figure 2 is a transverse section of the machine showing the clutchcontrol mechanism, etc.

Figure 3 is a side elevation of the machine showing the total printingmechanism.

Figure 4 is a detail side -view of the total latch control devices.

Figure 5 is a detail side view of the negative total control devices.

Figure 6 is a detail side view of/the control devices for locking thesegment stops.

Figure 'i' is a detail side elevation of the total n in position foraccomplishing the tripping of the total segment latch following aninterval of stoppage ol the machine.

General operation For cach denominational order, the machine is of eachlever 610 terminates in a segmental registering rack, the rearward armhas a lister type bar 611 pivoted thereto, and the upper arm hasa\"piv0tal.\cgnnection with a differentially movable toothed member orstop bar 615, cooperating with a column `of digital keys 215, one columnfor each said order.

The digital keys 215 which have been depressed to represent a value, arelatched in depressed position by slide plates 216, the lower ends of thekey stems lying in the paths of movement of the related teeth of saidbars S15, thereby allowing said bars t0 advance a distancecorrespendingto the values of said keys, upon-operation of the machine. Depression ofa digital key will also remove a column latch 214 from the path ofmovement of its related bar 615, these latches preventing movement of astop bar S15 and a lever 610 in any column in which no digital key isdepressed.

A rock shaft 301 is provided with cam means for governing the movementof a spring-tensioned rocker frame G16, mounted on shaft 608, said frame61S carrying a series of dogs 611 normally engaged by studs 65S of thelevers 610. As shaft 301 is rocked forwardly, the frame S16 will berocked, and any of the levers S10 which have been released by thedepression of digital keys will be allowed to rotate under the influenceof their springs 683, until they are stopped by the related teeth of thebars S15 contacting the stems of the keys. Upon rearward movement 0f theshaft 301, the dogs S11 will return the operated levers S10 to normalposition.

This excursion of the levers S10 serves to register amounts set in thekeyboard upon one or more accumulators and to set up a similar amount onthe printing line of the type bars.

These accumulators are shown in Gardner Patent No. 1,867,002, as meansfor storing positive or negative totals tobe printed. Tens carrymechanism is provided in accord with the disclosure of Gardner PatentNo. 1,828,180.

Motor drive means The shaft 301 is oscillated' by means of an electricmotor 100, connected through gearing 101 t Fig. 2) and clutch. meanswitha crank member 105, the latter being connected to an arm 316 withshaft 301 by`means'of a connecting rod 108. so that as crank arm 105 isrotated. thc shaft 301 is oscillated.

Clutch lever |06 is provided with an insulated roller adapted to closecertain contact members after lever |06 is moved out of restrainingengagement with the spring element of the clutch, (see Fig, 3 of theCrosman Patent No. 1,932,013). 5 These contact members constitutecircuit breaking devices in the electrical connection of the motor |00.I

Spring tends to pull lever |06 away from the clutch, said lever beingnormally heldin posil tion to render said clutch ineiective by means ofa latch H2. The clutch is disclosed in the Crosman Patent No. 1,932,013.

To establish the drive, latch |2 being released as will be hereinafterdescribed. clutch lever |06 la will be moved by its spring to render thesaid clutch eiective, and said Contact members will be engaged tothereby start the motor. Latch H2 being ireleased will return underspring tension to latching position, and towards the end 2o of the cycleof motor operation, an arm ||5 of crank member |05 will contact a tooth||6 of clutch lever |06 and thereby force said lever back to latchingposition and bring the lower end of said lever into the path of movementof a. member of the aforesaid clutch to render the latter inelective.

The above described excursions of the actuator levers 6|0 will effectpositive or negative registration of values set up in the keyboard asdisclosed in the Gardner Patent No. 1,867,002.

Total printing A total is taken by releasing the differentially movableelements or stop bars 6|5, the latter be- 35 ing then spring actuated torotate the accumulators subtractively until suitable shoulders on theaccumulator wheels contact with' 0 stop members. This will set up thetotal in the type bars and the hammers will be tripped to print 40 thetotal.

The machine is set for subtractive operation etc., upon depression oi.'total key 218, as disclosed in said Crosman patent, first named.

Depression of the total key 218 (Fig. 3), will 45 not only trip thecolumn latches 2|4 (Fig, 1), through pin 263 and clearout ball 221, butwill also trip a latch 62 0, through operation of crank arm 236 of shaft206, arm 229 and control lever 62|, pivotally connected to said latch.The latch 50 620 normally engages a lug 621, of total segment 6|8,thereby preventing movement of said segment under the influence of itsspring 68|. Upon tripping of said latch 820, total segment 6|8 willoperate a shaft 601 (Fig. 1), having a helically 55 arranged row ofpins, acting to trip the latchlng dogs 6 1 mounted on frame 6|6,successively from right to left of the machine, releasing certain stopmembers 6|3 so that the latter will fall into the paths of the 0 stops451 of the accumulator 60 wheels and also releasing the studs 559 0I andthe actuator levers 6 i0, as disclosed in the Gardner Patent No.1,867,002.

When this zeroizing operation has progressed' to the left hand side ofthe machine, a rearward- G5 ly etending arm of total segment 6|8 willcontact a projection of rod |30 (Fig. 3), having con nection withtrigger |3|, to move said rod downwardly, thereby releasing the latch||2 of clutch lever |06 whereby the motor clutch is rendered 70 e'ectiveand the cycle of motor operation is started.

The machine being thus started, the oscillatory frame sie (Fig. 1) wmcarry the dogs en downwardly and said dogs will snap under the 75 studs65S of the actuator levers 6| 0. The printing hammers will now betripped in known manner, if the total is a positive value, and uponrearward movement of said frame BIB, said actuator levers will berestored to normal position.

Negative totals In making a total, amounts carried up to the accumulatorwheel located to the left of the keyboard are `transferred to theprinting devices by means of a two-armed lever |40 (Fig. 5), similar tothe levers Gli] but having no connection with the keyboard. This lever|40 is normally held inactive by latch |4|, which in total taking istripped by a nger |42 on the shaft 601 controlling the successiverelease of the said levers 6|0. If the total is negative, thecomplemental registration in the accumulator will include a nine in theabove mentioned left hand wheel, and the movement of lever |40 fromeight to nine printing position is utilized to set the true negativetotal devices in operative position The method of converting thecomplement of a true negative total, set in the type bars, to the truenegative total is as follows:

A set of stops |43 (Fig. 1) yieldably engaging the stop bars 6|5 arelocked in position as adjusted thereby in accordance with thecomplemental registration during a. total taking operation and theactuator levers 6|0 are restored idly to normal position. Said levers610 are now again released and will be stopped by the stops |43,theaccumulator being meshed during this subtractive stroke of the saidlevers, whereby the complement is subtracted from zero, giving aregistration of the true negative total. The said levers 6|0 are againrestored idly to normal po- ..sition by a cycle of operation of frame6|6, and

the stops |43 are released, so that a second zeroizing operation willnow transfer the true totalto the type bars. 'I'he printing of thetotal, which' normally occurs at the end of the rst total settingoperation has in this case been delayed, and will occur after the truetotal is set. These operations include three cycles of motor operationand two total setting actions of total segment 6|8. l

In moving from eight to nine printing position, lever |40 contacts witha latch plate |44 (Fig. 5) and moves the same out of engagement with anarm |45 of setting shaft |46, which latter will thereupon be rocked byspring |41. The rocking of shaft I 46 suspends the operation of theprinting and normalizing devices as follows:

A printing operation is prevented during the conversion of thecomplemental amount on the totalizer by means of a spring actuated arm|48 which is released by the rearward movement of arm |45 and willthereupon engage a latch |43 of the hammer restoring bail 101, latchingsaid bail in position to prevent printing operation of the hammers 1 5(Fig. 5).

The release of the total'key 218 from its latch 223, (Fig. 3) isprevented by an arm |50 connected by link |5| with arm |52 of settingshaft |46, arm |50 being held in the rocked position of the shaft inengagement with a pawl 222 mounted on latch striker plate 220, so thatsaid 'pawl may not be operated to. actuate latch striker plate 220 solong as setting shaft |46 remains in rocked position (see Crosman PatentNo. 1,932,013). Total key 218 thus remaining latched in operativeposition, the subsequent operations will be of a subtractive nature, andthe column due to said total latches 2|4 will remain inactive keyremaining latched.

The latch |4| (Fig. 5) controlling the twoarmed lever |40, and theextreme left hand type bar, having been tripped in the total settingoperation, is held out of latching position when the total is negativeby a pivoted member |53, engaging beneath said latch, member |53 beingoonnected by a link |54 with an arm |55 of setting shaft |46. Said lever|40 being free from latch |4| will operate to its extreme degree ofmovement in the subtractive true negative total-setting operation of theaccumulator hereinbefore referred to, and will thereby subtract ninefrom the accumulator wheel Awith which it is engaged, whereby thesubtractive carry transmitted to this wheel during this same operationwill be erased.

The rst operation of the total taking mechanism under the influence ofspring 68| has served to render the motor clutch effective for thepurpose of restoring the actuator levers 6|0, etc. to normal position,and in order that a second cycle of motor operation may be secured, inwhich the subtractive operation of the accumulator will occur, the motorclutch will be maintained effective by means to be now described.

A latch arm |51 (Fig. 6), will be carried downward by shaft |46 out ofengagement with a latching pawl |58 mounted on a plate |59, pawl |58being held upward to permit the disengagement, by a second latching pawl|10. Plate |59 being released from the latch, will be drawn rearwardlyby spring pressed member |60 (Fig. 3), and a lug |6| of plate |59 willengage lug |62 of the aforesaid link |30 '(now in its lower position),connected tc the aforesaid trigger |3| and holding the latch ||2 out oflatching engagement with previously mentioned clutch lever |06.

In order to lock said stops |43 in the positions assumed during thepreliminary total taking, the plate |59 is provided with a pivotedextension |63 (Figs. 2 and 6), which in the rearward movement of plate|59 is held under tension against the roller |64 mounted on the free endof one arm of an intermediately fulcrumed lever |65. The consequentrelative movement of plate 59 and extension |63 will release latchingpawl |58 from the restraint of the second latching pawl |10, the formerpawl falling upon latch arm |51. The forward arm of lever |65 operates alocking bail |66, engaging serraticns of the stops |43, said lever beingnormally operated by a double faced cam |61 secured to armv3|6 ofoperating shaft 30|. As arm 3|6 moves forward, locking bail |65 isreleased, by the action of cam |61, while in the rearward movement ofarm 3|6 the cooperating roller of lever |65 will ride the upper face ofcam |61, whereby the locking bail is brought in contact with the stops|43. This will be the operation of the ,parts during the first cycle ofmotor operation which restores the actuator levers 6|0 to normalposition. A's the rear endof lever |65 is lifted by cam |61 however inthe return movement of the parts, roller |64 will be lifted free ofextension |63, and said extension will immediately move under saidroller, holding locking bail |66 in engaging position, where it willremain during the subtractive stroke of the second cycle of motoroperation, that is to say while the levers 6|0 move the accumulatorwheels subtractively from registering position to the extent allowed bythe stops |43. At the end of this stroke, a pin |68 in arm 3| 6 willengage a seat |69 in extension |63 and move plate |59 and its parts willbe held by latching pawl |58, moving into engagement with the shoulderof latch arm |51.

Plate |59 being moved forwardly, lug |6| thereof will be disengaged fromlug |62 of link |30, whereupon tripper 3| will be restored to, latchingposition and the clutch will be rendered again ineffective at the end ofthe secondl cycle of motor operation and the machine brought to rest.The true negative total being now registered in the accumulator, thesecond total taking operation occurring in the final motor operationcycle will Y result in the printing of the true negative total.

extension |63 forwardly, in which position the 7 `rocker cam 3| 8 torock In the disclosure of the Crosman Patent No. 1,915,296 the totallatch 620 is controlled to initiate this second total taking operationso that the tripping of latch 620 for the second time is delayed untilthe completion of the second motor operation cycle and at the end ofsaid cycle the push rod |35 will be automatically actuated by plate |34and trip said latch.

According to the present invention however the machine is brought torest at the end of the second cycle of motor operation with the truenegative total registered in the accumulator and prior to the printingof said total and there is no automatic tripping (forthe second time) ofthe latch 620 to initiate the final motor operation cycfe wherein thesecond total taking operation takes place.

'Ihus modification of the machine of said patent is requisite toeliminate shoulder |33 of rocker .plate |34 and automatic tripping (forthe second time) of latch 620, there being substituted therefor meansincluding a manipulative device to be now described for tripping saidlatch for the second-time. The operator, having been made aware that thetotal represents an over-draft, may either print the true negative totalon the statement sheet or on a separate sheet of paper, or may arrangefor clearing the total from the accumulator without printing. (Thelatter by the use of the well-known non-print mechanism.)

To complete the taking of the total the operator will push rearwardly alever fulcrumed at 2, this lever being adapted to trip the latch 620, sothat the total segment 6| 8 will again be operated, said segment againtripping the latch I2 of clutch lever |06 to render the motor clutcheffective, thereby effecting printing and final restoration of the partsto their normal positions.

Tripping of the latch 620 by manual lever is eifected as follows:

On the first total-taking operation, following the depression of totalkey 218, total segment 6|8 will rise from the position illustrated inFigure 7 into that shown in Figure 8, the lug 621 of said segmentcontacting a rear arm of latch control lever 62| and moving said leverso that the pin |32 thereof will be depressed and escape from the rearface of arm 229, whereupon the latch lspring 620' will rotate the latchand control lever to bring the pin |32 beneath arm 229.

During the forward movement of the cam 3|3 the total segment 6|8 will berestored to normal position by means of a slotted link 6I8' pivoted uponsaid segment and engaged by a pin 3|8 fixed in the cam 3i8.

During this movement of segment 6|8, lug 621, which is formed as a slidemounted upon segment 6 8 and held in normal position by spring tension,will snap under the end of latch 620, bringing the parts into theposition illustrated in Figure 9.

Thus the machine is brought to rest with pin |32 in a depressedposition, and a nger I4, pivoted at |3 upon lever I| eccentrically ofthe fulcrum I2 thereof is brought into a raised position, in whichposition manipulation of lever II will bring said-finger into Contactwith pin I 32 to trip the total segment latch as stated. Finger I4 isbrought into this raised position as follows: `A member |13 (FigA 4) ispivoted upon arm |12 of shaft |1|, said member lying normally betweenrocker cam 3I8 -and push rod |35. Shaft |1| is rigid with plate |59,and, as said plate moves rearwardly at the end of the first totalsettingoperation, pivoted member |13 will be carried out of register withrocker cam 3| 8, so that, upon the subsequent return of said cam tonormal position, push rod I 35 will not be operated. During thesubtractive cycle of operation, however, plate |59, being restored tonormal position by pin |68 and seat |69, pivoted member |13 will berestored to position beneath rocker -carn 3|8, and at the end of thiscycle the push -rod |35 will rock lever |34.

Rock lever |34 is connected with finger I4 by a pin and slot connectionI5, so that the rocking of said lever will raise the rear end of fingerI4 to a position opposite the depressed pin |32. Operation of lever I|by the operator will thus bring finger I4 into contact with pin |32 andwill displace latch 620 from contact with lug 6 I 1, releasing totalsegment 6 I8.

I ',Ihe depression of push rod |35 is utilized to restoresetting shaft|46 to normal position. For this purpose shaft |46 is provided with anarm |15 carrying-the pawl |16 which, as shaft |46 is rocked forwardly isheld by spring -|11 in contact with a shoulder |18 of push rod |35. As

the rod is moved downwardly, pawl |16 and arm |15 will rock the settingshaft back to normal position.v Setting shaft |46 and the partscontrolled thereby being restored to normalposition, the tripping of`total latch 620 will effect an ordinary total-taking operation.

Should the operator desireto print a total which he supposes to benegative, without interrupting the total taking operation, lever |I maybe manipulated to its rearward position either before or immediatelyafter depression of total key 218, and .is manually so held during thefirst 'two cycles of operation. Thus nger I4 will be positioned asillustrated in Figure l0, until rock lever |34 is operated at the end ofthe Second cycle of operation. This operation of rock lever I 34 willbring a rounded or carnshoulder I4 of finger I 4 upwardly against pin|32, camming said pin rearwardly and thus releasing total segment 6|8.

It will be obvious that this invention is readily applicable toregisters wherein means are provided for accomplishing the registrationof true negative sub-totals, as in the Fleming Patent No. 2,050,320.

I claim:

l. In a listing calculator, means for accomplishing the registration andprinting of ltrue negative total values. comprising a spring-urgeddevice. a latch therefor providedwith a control member. means including.a total key for engaging said control member to trip said latch. meansfor restoring said spring-urged` device and said latch, and means fortripping said latch for the second time including a power driven device,a manipulable device. and a member positionable by either device andoperable by the other device to engage said control member and therebytrip said latch.

2. In a listing calculator, means for accomplishing the registration andprinting of true negati-ve total values, comprising a spring-urgeddevice, a latch therefor provided with a control member, means includinga total key for engaging said control member to trip said latch, meansforrestoring said spring-urged device and said latch, and means fortripping said latch for the second time including a manipulable meansand a power driven means, a part of said manipulable means beingpositionableby said power driven means. said manipulable vmeansthereafter being operable to engage said 'control member to thereby tripsaid latch.

3. In a listing calculator, means for accomplishing the registration andprinting of true negative total values. comprising a spring-urgeddevice, a latch therefor provided with a control member, means includinga total key for engaging said control member to trip said latch, meansfor restoring said spring-urged device and said latch, and means fortripping said latch for the second time including a manipulable meansand a power driven means, a part of saidmanipulable means being operableby said power driven means when said manipulable means is positioned, toengage said control member to thereby trip said latch.

LORING PICKERING CROSMAN.

CERTIFICATE oF CORRECTION. patent No. 2,298,201. october 6, 19m.

LORING PICKERING cRosMAN.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page l,second column, line 55 before "withl insert -`ast; page 2, secondcolumn, line 8, for "making" read -taking; and that the said LettersPatent should be read with this correction therein that the same mayconform to the record of the case in the Patent Office.

Signed and sealed this 10th day of November, A. D. 191i?.

Henry Van Arsdale,

(Seal) Acting Commissioner of Patents.

CERMFICATE or CORRECTION. Patent No. 2,298,201. october 6, 19m.

LORING PICKERING oRosMAN.

It is hereby certified that error appears in the printed specificationof the above numbered patent requiring correction as follows: Page 1,second column, line 55, before with insert --fast; page 2, secondcolumn, line 8, for "making" read --taking; and that the said LettersPatent should' be read with this correction therein that the same mayconform tlo the record of the case in the Patent Office.

Signed and sealed this 10th day of November, A. D. 191i?.

Henry Van Arsdale, (Seal) Act-ing Commissioner of Patents

